| cmake_minimum_required(VERSION 3.13.4) |
| |
| # Tell cmake 3.0+ that it's safe to clear the PROJECT_VERSION variable in the |
| # call to project() below. |
| if(POLICY CMP0048) |
| cmake_policy(SET CMP0048 NEW) |
| endif() |
| |
| project (benchmark) |
| |
| foreach(p |
| CMP0054 # CMake 3.1 |
| CMP0056 # export EXE_LINKER_FLAGS to try_run |
| CMP0057 # Support no if() IN_LIST operator |
| ) |
| if(POLICY ${p}) |
| cmake_policy(SET ${p} NEW) |
| endif() |
| endforeach() |
| |
| option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON) |
| option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON) |
| option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF) |
| option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF) |
| option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF) |
| option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON) |
| |
| # Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which |
| # may require downloading the source code. |
| option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF) |
| |
| # This option can be used to disable building and running unit tests which depend on gtest |
| # in cases where it is not possible to build or find a valid version of gtest. |
| option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" OFF) |
| |
| set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF) |
| function(should_enable_assembly_tests) |
| if(CMAKE_BUILD_TYPE) |
| string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER) |
| if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage") |
| # FIXME: The --coverage flag needs to be removed when building assembly |
| # tests for this to work. |
| return() |
| endif() |
| endif() |
| if (MSVC) |
| return() |
| elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64") |
| return() |
| elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8) |
| # FIXME: Make these work on 32 bit builds |
| return() |
| elseif(BENCHMARK_BUILD_32_BITS) |
| # FIXME: Make these work on 32 bit builds |
| return() |
| endif() |
| find_program(LLVM_FILECHECK_EXE FileCheck) |
| if (LLVM_FILECHECK_EXE) |
| set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE) |
| message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}") |
| else() |
| message(STATUS "Failed to find LLVM FileCheck") |
| return() |
| endif() |
| set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE) |
| endfunction() |
| should_enable_assembly_tests() |
| |
| # This option disables the building and running of the assembly verification tests |
| option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests" |
| ${ENABLE_ASSEMBLY_TESTS_DEFAULT}) |
| |
| # Make sure we can import out CMake functions |
| list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules") |
| list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake") |
| |
| |
| # Read the git tags to determine the project version |
| # WARNING: This is meaningless for when the benchmark library is being built in-tree, |
| # so disable it and hardcode a null version. |
| # include(GetGitVersion) |
| # get_git_version(GIT_VERSION) |
| set(GIT_VERSION "v0.0.0") |
| |
| # Tell the user what versions we are using |
| string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION}) |
| message("-- Version: ${VERSION}") |
| |
| # The version of the libraries |
| set(GENERIC_LIB_VERSION ${VERSION}) |
| string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION) |
| |
| # Import our CMake modules |
| include(CheckCXXCompilerFlag) |
| include(AddCXXCompilerFlag) |
| include(CXXFeatureCheck) |
| |
| if (BENCHMARK_BUILD_32_BITS) |
| add_required_cxx_compiler_flag(-m32) |
| endif() |
| |
| if (MSVC) |
| # Turn compiler warnings up to 11 |
| string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4") |
| add_definitions(-D_CRT_SECURE_NO_WARNINGS) |
| |
| if (NOT BENCHMARK_ENABLE_EXCEPTIONS) |
| add_cxx_compiler_flag(-EHs-) |
| add_cxx_compiler_flag(-EHa-) |
| add_definitions(-D_HAS_EXCEPTIONS=0) |
| endif() |
| # Link time optimisation |
| if (BENCHMARK_ENABLE_LTO) |
| set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL") |
| set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG") |
| set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG") |
| set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG") |
| |
| set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL") |
| string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}") |
| set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG") |
| string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}") |
| set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG") |
| string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}") |
| set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG") |
| |
| set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL") |
| set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG") |
| set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG") |
| set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG") |
| endif() |
| else() |
| # Try and enable C++11. Don't use C++14 because it doesn't work in some |
| # configurations. |
| add_cxx_compiler_flag(-std=c++11) |
| if (NOT HAVE_CXX_FLAG_STD_CXX11) |
| add_cxx_compiler_flag(-std=c++0x) |
| endif() |
| |
| # Turn compiler warnings up to 11 |
| add_cxx_compiler_flag(-Wall) |
| |
| add_cxx_compiler_flag(-Wextra) |
| add_cxx_compiler_flag(-Wshadow) |
| # FIXME(kbobyrev): Document this change. |
| # add_cxx_compiler_flag(-Werror RELEASE) |
| # add_cxx_compiler_flag(-Werror RELWITHDEBINFO) |
| # add_cxx_compiler_flag(-Werror MINSIZEREL) |
| add_cxx_compiler_flag(-pedantic) |
| add_cxx_compiler_flag(-pedantic-errors) |
| add_cxx_compiler_flag(-Wshorten-64-to-32) |
| add_cxx_compiler_flag(-Wfloat-equal) |
| add_cxx_compiler_flag(-fstrict-aliasing) |
| if (NOT BENCHMARK_ENABLE_EXCEPTIONS) |
| add_cxx_compiler_flag(-fno-exceptions) |
| endif() |
| |
| if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG) |
| add_cxx_compiler_flag(-Wno-suggest-override) |
| endif() |
| |
| if (HAVE_CXX_FLAG_FSTRICT_ALIASING) |
| if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing |
| add_cxx_compiler_flag(-Wstrict-aliasing) |
| endif() |
| endif() |
| # ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden |
| # (because of deprecated overload) |
| add_cxx_compiler_flag(-wd654) |
| add_cxx_compiler_flag(-Wthread-safety) |
| if (HAVE_CXX_FLAG_WTHREAD_SAFETY) |
| cxx_feature_check(THREAD_SAFETY_ATTRIBUTES) |
| endif() |
| |
| # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a |
| # predefined macro, which turns on all of the wonderful libc extensions. |
| # However g++ doesn't do this in Cygwin so we have to define it ourselfs |
| # since we depend on GNU/POSIX/BSD extensions. |
| if (CYGWIN) |
| add_definitions(-D_GNU_SOURCE=1) |
| endif() |
| |
| # Link time optimisation |
| if (BENCHMARK_ENABLE_LTO) |
| add_cxx_compiler_flag(-flto) |
| if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU") |
| find_program(GCC_AR gcc-ar) |
| if (GCC_AR) |
| set(CMAKE_AR ${GCC_AR}) |
| endif() |
| find_program(GCC_RANLIB gcc-ranlib) |
| if (GCC_RANLIB) |
| set(CMAKE_RANLIB ${GCC_RANLIB}) |
| endif() |
| elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang") |
| include(llvm-toolchain) |
| endif() |
| endif() |
| |
| # Coverage build type |
| set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}" |
| CACHE STRING "Flags used by the C++ compiler during coverage builds." |
| FORCE) |
| set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}" |
| CACHE STRING "Flags used for linking binaries during coverage builds." |
| FORCE) |
| set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}" |
| CACHE STRING "Flags used by the shared libraries linker during coverage builds." |
| FORCE) |
| mark_as_advanced( |
| BENCHMARK_CXX_FLAGS_COVERAGE |
| BENCHMARK_EXE_LINKER_FLAGS_COVERAGE |
| BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE) |
| set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING |
| "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.") |
| add_cxx_compiler_flag(--coverage COVERAGE) |
| endif() |
| |
| if (BENCHMARK_USE_LIBCXX) |
| if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") |
| add_cxx_compiler_flag(-stdlib=libc++) |
| elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR |
| "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel") |
| add_cxx_compiler_flag(-nostdinc++) |
| message("libc++ header path must be manually specified using CMAKE_CXX_FLAGS") |
| # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break |
| # configuration checks such as 'find_package(Threads)' |
| list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs) |
| # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because |
| # linker flags appear before all linker inputs and -lc++ must appear after. |
| list(APPEND BENCHMARK_CXX_LIBRARIES c++) |
| else() |
| message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler") |
| endif() |
| endif(BENCHMARK_USE_LIBCXX) |
| |
| # C++ feature checks |
| # Determine the correct regular expression engine to use |
| cxx_feature_check(STD_REGEX) |
| cxx_feature_check(GNU_POSIX_REGEX) |
| cxx_feature_check(POSIX_REGEX) |
| if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX) |
| message(FATAL_ERROR "Failed to determine the source files for the regular expression backend") |
| endif() |
| if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX |
| AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX) |
| message(WARNING "Using std::regex with exceptions disabled is not fully supported") |
| endif() |
| cxx_feature_check(STEADY_CLOCK) |
| # Ensure we have pthreads |
| find_package(Threads REQUIRED) |
| |
| # Set up directories |
| include_directories(${PROJECT_SOURCE_DIR}/include) |
| |
| # Build the targets |
| add_subdirectory(src) |
| |
| if (BENCHMARK_ENABLE_TESTING) |
| enable_testing() |
| if (BENCHMARK_ENABLE_GTEST_TESTS) |
| include(HandleGTest) |
| endif() |
| add_subdirectory(test) |
| endif() |